842465281 has 10 divisors (see below), whose sum is σ = 982820482. Its totient is φ = 722111040.

The previous prime is 842465279. The next prime is 842465287. The reversal of 842465281 is 182564248.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 838623681 + 3841600 = 28959^2 + 1960^2 .

It is not a de Polignac number, because 842465281 - 2¹ = 842465279 is a prime.

It is a super-2 number, since 2×842465281² = 1419495499380817922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842465287) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 173040 + ... + 177841.

It is a Proth number, since it is equal to 12855 ⋅ 2¹⁶ + 1 and 12855 < 2¹⁶.

Almost surely, 2^842465281 is an apocalyptic number.

It is an amenable number.

842465281 is a deficient number, since it is larger than the sum of its proper divisors (140355201).

842465281 is an frugal number, since it uses more digits than its factorization.

842465281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350909 (or 350888 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 842465281 is about 29025.2524709088. The cubic root of 842465281 is about 944.4609454244.

The spelling of 842465281 in words is "eight hundred forty-two million, four hundred sixty-five thousand, two hundred eighty-one".